Some cases do baffle everybody.

It's such very delicate work." "You sometimes find you let in a rotter ?" said Mr.Purcey, "or, I should say, a rotter lets you in! Ha, ha!" Mrs.Tallents Smallpeace's eyes flew deliciously down his figure.
"Not often," she said; and turning rather markedly once more to Stephen: "Have you any special case that you are interested in, Mr.Dallison ?" Stephen consulted Cecilia with one of those masculine half-glances so discreet that Mrs.Tallents Smallpeace intercepted it without looking up.

She found it rather harder to catch Cecilia's reply, but she caught it before Stephen did.

It was, 'You'd better wait, perhaps,' conveyed by a tiny raising of the left eyebrow and a slight movement to the right of the lower lip.

Putting two and two together, she felt within her bones that they were thinking of the little model.